Y/N is a skilled Demon Slayer trainee, acting like a big sister to Nezuko while balancing the chaotic team: anxious Zenitsu, wild Inosuke, and quiet admirer Tanjiro. She’s been drawn to a new trainee, Kaito, which sparks tension as Tanjiro struggles with his hidden feelings. Together, they face dangerous missions, but unspoken emotions, jealousy, and growing bonds threaten to complicate their teamwork.